Grrr right now we don't support 10.04 64-bit. We do support 11.04 which may or may not help you! I wish we had a build engineer so we could get support for all distros. At some point we'll need one. You of course can also run a virtual machine running say 11.04 or 11.10 of Ubuntu.

I had the same issue running the .bin file on Ubuntu 11.10 and the segfault on the other file (though that was not identical, probably because I already had some of the QT libraries installed). For me the fix was simple: